Meso-structure character of soil-rock mixtures based on digital image

For studying the meso-structure character of soil-rock mixture, the digital image processing is used in this paper. So the abundant information of the each soil-rock mixture sample's photograph was gained and the "conception model" of each sample was also built. Based on the information, the granularity characters, the fraction of the roughness of the rock blocks' surface, the directional dimension of rock blocks and the configuration characters were analyzed. The results indicate that confusion is only the external performance of the soil-rock mixtures. In fact, soil-rock mixtures have a good character of self-comparability in statistics.